gtk:tree-selection-select-range (selection start end)

selection -- a gtk:tree-selection object
start -- an initial gtk:tree-path node of the range
end -- a final gtk:tree-path node of the range

Selects a range of nodes, determined by start and end inclusive. The selection argument must be set to :multiple mode. The gtk:tree-selection implementation is deprecated since 4.10. Please do not use it in newly written code.